參數(shù)資料
型號(hào)： MAX1994ETM
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： Dual Step-Down Controllers Plus Linear- Regulator Controller for Notebook Computers
中文描述： DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, CQCC48
封裝： 7 X 7 MM, 0.80 MM HEIGHT, THIN, QFN-48
文件頁(yè)數(shù)： 28/49頁(yè)
文件大?。?/td> 983K
代理商： MAX1994ETM
M
Dual Step-Down Controllers Plus Linear-
Regulator Controller for Notebook Computers
28
______________________________________________________________________________________
BUCK1 Integrator
BUCK1 includes a transconductance integrator (Figure
4) that provides a fine adjustment to the output regula-
tion point. The integrator forces the DC average of the
feedback voltage to equal the VID DAC setting. The cir-
cuit has the ability to lower the output voltage by 3%
and raise it by 3%.
The differential input voltage range for the amplifier is at
least
±
60mV total, including DC offset and AC ripple.
The integration time constant can be easily set with a
capacitor at the CC pin. Use a capacitance of 47pF to
1000pF (47pF typ). The transconductance of the ampli-
fier is 80μS (typ).
Figure 5. BUCK2 PWM Control Diagram
S
R
Q
TOFF
ONE-SHOT
Q
Q
TRIG
ZERO CROSSING
OVP/UVP
DETECTOR
RESET
OUT
TIMER
ON/OFF
CONTROL
TON ONE-SHOT
TRIG
Q
ON-TIME
COMPUTE
ERROR
AMPLIFIER
V+
OUT2
TON2
REF
PGOOD2
SKP2/SDN
TO DH2 DRIVER
INPUT
TO DL2 DRIVER
INPUT
ILIM2
CS2
GND
FB2
OUT2
FIXED 1.5V
DUAL-MODE FEEDBACK MUX
FIXED 1.8V
REF - 10%
REF + 10%
1V
2V
S
R
Q
∑
OVPEN
OVPEN
R
R
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1994ETM+ 功能描述:DC/DC 開(kāi)關(guān)控制器 Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1994ETM+T 功能描述:DC/DC 開(kāi)關(guān)控制器 Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1994ETM-T 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1994EVKIT 功能描述:DC/DC 開(kāi)關(guān)控制器 Evaluation Kit for the MAX1816 MAX1980 MAX1994 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1995EGI 功能描述:顯示驅(qū)動(dòng)器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel
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